This is hardly language which could be used with reference to papers lodged in the custody of the Society: it would seem as if Jones, in 1709 or 1710, became the owner or borrower of papers, till then in private hands exclusively. Can any evidence be brought forward as to the manner in which Jones and the Royal Society, or either, obtained these papers? I believe the Royal Society itself can give no information. A. DE MORGAN. Minor Queries. _Madrigal, Meaning of._--What is the derivation of the word _madrigal_? NEMO. "_Experto crede Roberto._"--Can any of your correspondents inform me what is the origin of the expression so frequently quoted, "Experto crede Roberto?" W. L. _Chronological Institute._--I understand a Chronological Institute has been formed in London. Can you inform me where a prospectus can be obtained? F. B. RELTON. _Buzz._--What is the derivation of the word _buzz_, _i.e._ empty the bottle; and how came it to have that extraordinary meaning? W. _The Old Scots March._--Can any of your correspondents throw light on the _measure_ of the "Old Scots March," which appears to have been beat with triumphant success as to many of the onslaughts, infalls, and other martial progresses of Gustavus's valiant brigades? Grose has given what he styles "The English March," as ordered to be beat by Prince Henry. And as a pendant, the recovery of "The Scots March" would be very desirable. J. M. _Hans Holbein._--Is the place of this eminent artist's sepulture now known? His death (by the plague) in 1554 was probably a release from neglect and poverty. When he was compelled to give up his painting-rooms at the palace, after Henry's decease, he is conjectured to have resided in Bishopsgate street. EDWARD F. RIMBAULT. _Ivory Medallion of Lord Byron._--In the catalogue which Mr. Cole, of Scarborough, printed in 1829, of books in his private collection, he mentions a copy of Lord Byron's _Marino Faliero_, 1821, bound in a unique style, and having, inserted in a recess, on the front cover, a finely finished head of the noble poet, on ivory, in high relief, of beautiful Italian carving. Can any of your correspondents tell me who is now the possessor of this work of art? W. S. G. Newcastle-on-Tyne.